MerakiDashboardの i アイコンをマウスオーバーした際に表示される Controller disconnection behavior の説明は下記の通りです。
Login attempts on this SSID will be processed by the Meraki Cloud Controller. What should happen to new clients if your Internet uplink is down or the controller is otherwise unreachable?
sudo sh -c "cat << 'EOF' > /etc/needrestart/conf.d/99_restart.conf
# Restart mode: (l)ist only, (i)nteractive or (a)utomatically.
#
# ATTENTION: If needrestart is configured to run in interactive mode but is run
# non-interactive (i.e. unattended-upgrades) it will fallback to list only mode.
#
\$nrconf{restart} = 'a';
EOF"
sysadmin [ ~ ]$ terraform version
Terraform v1.3.2
on linux_amd64
Your version of Terraform is out of date! The latest version
is 1.5.5. You can update by downloading from https://www.terraform.io/downloads.html
sysadmin [ ~ ]$
sysadmin [ ~ ]$ echo ${PATH}
~/.local/bin:~/bin:~/.dotnet/tools:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/istio-latest/bin:/usr/local/linkerd/bin:/usr/lib/golang/bin:/opt/mssql-tools18/bin:~/bundle/bin:~/bundle/gems/bin
sysadmin [ ~ ]$
sysadmin [ ~ ]$ which terraform
/home/sysadmin/bin/terraform
sysadmin [ ~ ]$
sysadmin [ ~ ]$ terraform version
Terraform v1.3.2
on linux_amd64
Your version of Terraform is out of date! The latest version
is 1.5.2. You can update by downloading from https://www.terraform.io/downloads.html
sysadmin [ ~ ]$
az ad sp list --display-name ${SP_NAME}
az ad sp delete --id `az ad sp list --display-name ${SP_NAME} | jq -r .[].id`
az ad sp list --display-name ${SP_NAME}
az ad app list --display-name ${SP_NAME}
az ad app delete --id `az ad app list --display-name ${SP_NAME} | jq -r .[].id`
az ad app list --display-name ${SP_NAME}
Step 16
To make the Serial console accessible, navigate to Boot diagnostics in Support + troubleshooting.
Step 17
Choose the Enable with custom storage account settting.
Step 18
Choose an existing storage account or create a new one.
You can now navigate to the Day 0 configuration using either serial console, SSH to the controller, or Web UI.
Public CloudのVirtual Machineへの管理接続はIP Reachabilityがあるのを前提にしているケースが多いと思います。
Serial Console接続できるのをいいことに、IP Reachabilityを失うような作業をして、開発者が想定していないような状態にするのは避けた方が無難です。